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* Fully updated throughout to cover all the Technical Certificate Diploma requirements, and all the underpinning key knowledge for the NVQ. * Material on energy efficiency and sustainability is included, saving hours of research time. * Straightforward language ensures that even the most technical concepts are accessible, and a glossary of terms and updated end-of-unit knowledge checks enable students to track their progress at the end of each chapter. * Exam style multiple-choice assessment questions provide extra support for revision and exam preparation.